July weather forecastLake Bluff, IL
July
Weather in July
July represents the zenith of summer in Lake Bluff, embracing the highest temperatures of the year with the maximum reaching 77.7°F (25.4°C). A dip in the lake is often the day's highlight, as residents flock to beaches to escape the heat. The clear skies and warm nights, perfect for stargazing, further augment the magic of summer. July outshines June with marginally higher temperatures, giving rise to mesmerizing sunsets. Acknowledging the charm of summer, Lake Bluff thrives with outdoor events and water activities.Temperature
July is the month when Lake Bluff's temperatures reach their peak, with averages of 77.7°F (25.4°C) and lows of 66.7°F (19.3°C).Humidity
In July, the average relative humidity is 78%.Rainfall
In Lake Bluff, in July, during 17.4 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. In Lake Bluff, during the entire year, the rain falls for 154.1 days and collects up to 30.24" (768mm) of precipitation.Snowfall
May through September are months without snowfall.Ocean temperature
In Lake Bluff, in July, the average water temperature is 70.3°F (21.3°C).Note: Swimming in 70.3°F (21.3°C) is not an enjoyable experience for most. Breathing becomes progressively more challenging as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Lake Bluff, the average length of the day in July is 14h and 55min.On the first day of the month, sunrise is at 5:19 am and sunset at 8:31 pm. On the last day of July, sunrise is at 5:43 am and sunset at 8:11 pm CDT.
Sunshine
In July, the average sunshine is 10.6h.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In July, the maximum UV index of 6 translates into these guidelines:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
Lake Bluff, IL
- Average high temperature in July: 77.7°F
The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in July: 66.7°F
The months with the highest average low temperature are July and August (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in July
Lake Bluff, IL
- Average pressure in July: 29.97"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in July
Lake Bluff, IL
- Average wind speed in July: 7.5mph
The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).
Average humidity in July
Lake Bluff, IL
- Average humidity in July: 78%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in July
Lake Bluff, IL
- Average rainfall in July: 3.23"
The wettest months (with the highest rainfall) are May and June (3.82").
The driest month (with the least rainfall) is December (1.3").
Average rainfall days in July
Lake Bluff, IL
- Average rainfall days in July: 17.4 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in July
Lake Bluff, IL
- Average snowfall in July: 0"
The month with the highest snowfall is January (4.13").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in July
Lake Bluff, IL
- Average snowfall days in July: 0 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature in July
Lake Bluff, IL
- Average sea temperature in July: 70.2°F
The best month for swimming (with the highest average sea temperature) is August (73.3°F).
The coldest month (with the lowest average sea temperature) is February (37.1°F).
Average daylight in July /
Average sunshine in July
Lake Bluff, IL
- Average daylight in July: 14h and 54min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in July: 10h and 36min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in July
Lake Bluff, IL
- Average sunshine days in July: 11.5 days
The month with the most sunshine days is December (15.3 days).
The month with the least sunshine days is April (10.8 days).
Average UV index in July
Lake Bluff, IL
- Average UV index in July: 6
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in July
Lake Bluff, IL
- Average cloud cover in July: 27
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in July
Lake Bluff, IL
- Average visibility in July: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
